I've had a perforated bowel, and became septic following my c-section 13 months ago and now i am pregnant. what are the complications?

Certainly the same: Risks apply. Bowel injuries are uncommon in c-section so it may have been partly because you have issues that make surgery difficult. The docs will be vigilant, i'm sure, so perhaps this time a perforation will be less likely. You may consider trying vaginal birth, depending on number of c-sections and/or why u had your first c-section. Congradulation's on your pregnancy.